How to keep tasks AWS Lambda function is running

I'm running an AWS Lambda function script which is all working fine. The task I need help with is:<br><br>1) How can I keep the AWS Lambda function running 24/7 without putting it on RUN all the time.<br>2) How to perform multiple RUNS and when Lambda Function is already running? How can we keep it running while it's processing and just close it when we stop or done.